Generally, you'll find fuse boxes and relay centers in these locations on a 1998 F-150:
* Under the hood: This is the most common location for a large fuse box/relay center. It's usually located near the battery. The cover will likely have a diagram showing the fuse/relay layout. Opening it typically involves releasing clips or latches on the cover.
* Inside the cab: There might be a smaller fuse box inside the cab, often under the dashboard on the driver's side. Again, look for clips or latches to release the cover.
To access either box:
1. Consult your owner's manual: This is the best resource. It will show you diagrams of the fuse boxes, their locations, and fuse ratings.
2. Locate the box: Use the manual or visually search the likely locations mentioned above.
3. Identify the cover release mechanism: Look for clips, latches, or screws holding the cover in place. Some are simple push-to-release, others might have levers or screws. Gently pry or press as needed. Avoid excessive force that could damage the box or its cover.
Important Safety Note: Before working with any electrical components, disconnect the negative terminal of your vehicle's battery to prevent electrical shocks or short circuits.